関連ワード:  python right 3 characters of string    python last 3 characters of string    python first 3 characters of string    python first 3 letters of string    python last 3 letters of string    python get last 3 characters of string    python get first 3 characters of string    python print last 3 characters of string    python check first 3 characters of string    python get first 3 characters of string column